Answer: 8 textbooks
Step-by-step explanation:
Sold 40 notebooks = 40 x $4 = $160
$800 - $160 = $640 left to sell
$640/$80 (cost of textbook) = 8 textbooks need to be sold
Answer:
22
Step-by-step explanation:
Working backwards
1+1 then x2 is 4
4+1 then x2 is 10
10+1 then x2 is 22
It depends on how wealthy the city is
(h,h,h)
(h,h,t)
(h,t,h)
(h,t,t)
(t,h,h)
(t,h,t)
(t,t,h)
(t,t,t)
t stands for tails
h stands for heads